Cover for fastener



FIG. 1 is a plan view of a cover for fastener showing my new design;

FIG. 2 is a left side elevation view which is similar to the right side elevation view;

FIG. 3 is an elevation view on a plane perpendicular to that of FIG. 2 which is the same as seen from both sides of the device; and

FIG. 4 is a view in cross section taken on the plane indicated by the line 4--4 in FIG. 1 and looking in the direction of the arrows. 

The ornamental design for a cover for fastener, as shown and described. 